IT1050308B - (Meth)acrylonitrile recovery and purificn from ammoxidn effluent - with recycle of prod column bottoms to form quench liq in quench system
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(Meth)acrylonitrile recovery and purificn from ammoxidn effluent - with recycle of prod column bottoms to form quench liq in quench system
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IT1050308B
IT1050308BIT2960375AIT2960375AIT1050308BIT 1050308 BIT1050308 BIT 1050308BIT 2960375 AIT2960375 AIT 2960375AIT 2960375 AIT2960375 AIT 2960375AIT 1050308 BIT1050308 BIT 1050308B
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Application filed by Standard Oil Co OhiofiledCriticalStandard Oil Co Ohio
Priority to IT2960375ApriorityCriticalpatent/IT1050308B/en
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Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
In the recovery and purification of acrylonitrile produced by the reaction of propylene, O2 and NH3 in the presence of an ammoxidation catalyst, which consists of (a) contacting the ammoxidation reactor effluent with an aq. quench liquid in a quench system to produce a gaseous quench effluent having a temp. of 90-230 degrees F, (b) removing this effluent and absorbing it in water to form a soln., (c) distilling most of the by-products of the ammoxidation reaction and most of the water from the soln. to obtain a liquid stream contg. crude acrylonitrile, and (d) distilling the crude acrylonitrile to obtain a gaseous overhead stream of product quality acrylonitrile and a bottoms stream contg. acrylonitrile and impurities and having a pH of 3-5, the improvement comprises recycling part of the liq. bottoms stream obtd. in step(d) as at least part of the quench liquid in step (a). This improvement may also be applied to the recovery and purification of methacylonitrile by ammoxidation of isobutylene. There is no need for the fractional distillation column of prior art. and the efficiency of the recovery and purification system is improved.
IT2960375A1975-11-241975-11-24(Meth)acrylonitrile recovery and purificn from ammoxidn effluent - with recycle of prod column bottoms to form quench liq in quench system
IT1050308B
(en)
Improved procedure for the recuperation and purification of acrylonitril or metacrilonitril. (Machine-translation by Google Translate, not legally binding)